50% (1987)

60% (1995)

58% (1984)

67% (2003)

69% (1982)

54% (1980)

60% (1976)

51% (1996)

50% (1988)

50% (1996)

0% (1980)

45% (1985)

65% (1995)

45% (1978)

78% (1987)

62% (1979)

10% (1978)

47% (1987)

55% (1987)

57% (1998)